5503878721 has 6 divisors (see below), whose sum is σ = 6049718066. Its totient is φ = 5003526000.

The previous prime is 5503878719. The next prime is 5503878761. The reversal of 5503878721 is 1278783055.

It can be written as a sum of positive squares in only one way, i.e., 3079695025 + 2424183696 = 55495^2 + 49236^2 .

It is not a de Polignac number, because 5503878721 - 2¹ = 5503878719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5503878761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22743180 + ... + 22743421.

Almost surely, 2^5503878721 is an apocalyptic number.

It is an amenable number.

5503878721 is a deficient number, since it is larger than the sum of its proper divisors (545839345).

5503878721 is a wasteful number, since it uses less digits than its factorization.

5503878721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45486623 (or 45486612 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 5503878721 is about 74188.1305937816. The cubic root of 5503878721 is about 1765.5890167104.

The spelling of 5503878721 in words is "five billion, five hundred three million, eight hundred seventy-eight thousand, seven hundred twenty-one".